#!/usr/bin/env sh
# This file is part of bearssl-sys. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/bearssl-sys/master/COPYRIGHT. No part of bearssl-sys, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
# Copyright © 2016 The developers of bearssl-sys. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/bearssl-sys/master/COPYRIGHT.


set -e
set -u
set -f


_program_path_find()
{
    if [ "${_program_fattening_program_path+set}" = 'set' ]; then
        printf '%s\n' "$_program_fattening_program_path"

    elif [ "${0%/*}" = "$0" ]; then

        # We've been invoked by the interpreter as, say, bash program
        if [ -r "$0" ]; then
            pwd -P
        # Clutching at straws; probably run via a download, anonymous script, etc, weird execve, etc
        else
            printf '\n'
        fi

    else

        # We've been invoked with a relative or absolute path (also when invoked via PATH in a shell)

        _program_path_find_parentPath()
        {
            parentPath="${scriptPath%/*}"
            if [ -z "$parentPath" ]; then
                parentPath='/'
            fi
            cd "$parentPath" 1>/dev/null
        }

        # pdksh / mksh have problems with unsetting a variable that was never set...
        if [ "${CDPATH+set}" = 'set' ]; then
            unset CDPATH
        fi

        if command -v realpath 1>/dev/null 2>/dev/null; then
            (
                scriptPath="$(realpath "$0")"

                _program_path_find_parentPath
                pwd -P
            )
        elif command -v readlink 1>/dev/null 2>/dev/null; then
            (
                scriptPath="$0"

                while [ -L "$scriptPath" ]
                do
                    _program_path_find_parentPath
                    scriptPath="$(readlink "$scriptPath")"
                done

                _program_path_find_parentPath
                pwd -P
            )
        else
            # This approach will fail in corner cases where the script itself is a symlink in a path not parallel with the concrete script
            (
                scriptPath="$0"

                _program_path_find_parentPath
                pwd -P
            )
        fi

    fi
}

compile_on_mac_os_x_using_cargo_fail()
{
	local message="$1"
	
	printf 'compile-on-mac-os-x-using-cargo:FAIL:%s\n' "$message" 1>&2
	exit 1
}

compile_on_mac_os_x_using_cargo_ensureRequiredBinariesArePresent()
{
	local reason="$1"
	shift 1

	local binary
	local missing=false
	for binary in "$@"
	do
		if ! command -v "$binary" 1>/dev/null 2>/dev/null; then
			printf 'compile-on-mac-os-x-using-cargo:%s\n' "The binary '$binary' needs to be in the path" 1>&2
			missing=true
		fi
	done

	if $missing; then
		compile_on_mac_os_x_using_cargo_fail "Please make sure that the missing binaries are installed because '$reason'"
	fi
}

_compile_on_mac_os_x_using_cargo_prepareForMacOSX_brewInstall()
{
	compile_on_mac_os_x_using_cargo_ensureRequiredBinariesArePresent brew
		
	local packageName="$1"
	if ! brew ls --versions "$packageName" 1>/dev/null 2>/dev/null; then
		brew install "$packageName" 1>&2
	fi
}

compile_on_mac_os_x_using_cargo_main()
{
	_compile_on_mac_os_x_using_cargo_prepareForMacOSX_brewInstall FiloSottile/musl-cross/musl-cross
	
	cd "$(_program_path_find)"/.. 1>/dev/null 2>/dev/null
	
	CROSS_COMPILE=x86_64-linux-musl- cargo "$@" --target x86_64-unknown-linux-musl
}

compile_on_mac_os_x_using_cargo_main "$@"